Elevator-car-control mechanism



A 1,526,807 g. B. sMrrH Y ELEVATOR CAR CONTROL MECHANISM 'Filed Dei. 11, 1922 s sheets-sheet 1 A TTORNE Y Y seb.. 1'?. 19,25.

` 1,526,807 E. B. SMITH ELEVATOR CAR CONTROL MECHNISM Filed Dec. 11. 1922 s sheets-sheet r2 A TTORNE Y 1,526,8cv1A Feb. 17. 1925.

E. B. swirl-l' ELEVATOR CAR CONTROL MECHANISM 5 Sheets-S'heetf 3V Filed Dec. 11, 1922 IN VEN TOR zra 5222 2% BZ/Z/w A TTORNE Y Patented Feb. 17, 1925'.

nznn n. nmmn, on nnvnns non, ILLINOIS, AsgmGNoR To eeen" ELEVATQRTCAECQNTRQL MEcHnNIgM.

Applieetion filed Deeegnber 11, .exiall-No. SQSlZ- To all whom gft. mtylownojjn:

Be it lnonn @Enne l3- e Citizen of the .Un ed @toten e .reel ook, Qhloego,

of 14Rey.enewooo't oonnty of' endfSteto of Illinois, bovenin nted oentonn` non end neefnl' lmplfovemente .in '-Eleyetor- Gon-Gontnol Meohonieln, of the ifelloning ie-'e eneoloetion- Y `Tllfe intention nelotee to doors enel nortenlerly to hotohyvey or ,le olonne, for Voter ehetteor ,Sefety .tentons it ie tory impolztont that lletehwey doors loe kent oloeeol `under normnlfoondiltione inhenthe .elevator oor is not disposed et the lending opposite' the doorn Cllhe invention hele been loertonlorly deyeloped in eo'nneoton Wththe normally oloeoltype of door 'Where'the `dools ,et lending een be opened onli; when the ein is located at that landing.

This invention lone `for its salient objeet tolnvsnre the closing of bathvvny lQorsAbefore the elevetjoroo-l leaves the lending Where the doors eleloeoted- Another objeot of the invention is to provide e Control. lneollonienl oonneotionbetween the hetohwny doofe' and elevotol oor control crquit such that the power Will b e ont oft flolnthe eer oontlfol oreut when the" olooleone opned and `will loe restored only Whenthe oloorfI are closed.

Funther objeots ofthe invention will np:-

Peel from the following description teken in Connection with the drawings which foxnl a part of this application and` in Whiteh- Fgz 1 s a sectional elevation Qf 'an/elevatoll hatchtvay showing a plurality of sts of hatchway doors.

Fg.l2;s a sectional elevation ofone side of the hatchwa-y shown in Fig. l.

Fig. 3 i's an enlarged elevational view of a portion of the hetohtnay showing the oonneetiene loetweenthe door `e. mtrol nleohenieln and the Control oironit `for the elevator een Eig. l is n sectional elevation taken enbstnnt-ialjly 011 line 11i-4e Qf Eig. `3.

Fig. 5 is a Sectio-nal elevnilon tellen eno etnntolly on l'neo' of; Eig- Fig. 6 is e Sectional elevation' teken onlnstantally on 1in@` 6-6 of Eig. `3.

Fig. 7 its en elevational View Slnlnl to Fig-3 but ellowng nnotherionn of tion etween the llntohwo'y 'oleo-13e end the "oer Control oronit end Fig l te o l .eeet-lonol ,eleyotion token ont:

sta-ntally on line 8 8 of Fig. 7.

Ll-he invention :buiely oeeenlloled' `tonneneee elenteh zlooeltel inftlle ,eleyotel een control onentonel feo eonetrnletled errengefl' tllot the poner iS l ont off trono the .eer :Control enent when the doorn ere .open enel. the leonie? lenvolnble in the eontnol elrenit only wnenthe ,floors ere flopofeed in their oloeesl position In. the. inetelnloodinlent .of the invention the door is` Qrmgplly QlQeL thg omver eeeton loeng hoo-ner then the lone Section enel tlne embodiment o nolnlelly oloeeftl o le eonneetedintheeer eontliol enteit thereby enpplying 'poner to the .eo-1. 'Elle emiten enel @nie/nit oreopened only when talle loten for netennlg :the "hetohwey doorn. onen, is dienoeefl in lotohng position- -thie door letoh le rele ed ellowlng theidoortooloee the ewtoh ie eloeed thus motoring Power `to the oer Control einent- The letoh releneng onenetion for the tiret enlbo .,nnent ieperformesl by the o-neletol .on theoer- In .the eeoond emboelnlent retorted to the switoll in the een ol orenit ie opened when the doofe move to theirY onen potei en one iS oloeed` by the doorettllen] .the door eeohthen elooed looeition. In Yenne Connell lone of elevator 'oonetrlnoton it le `(le: en? lele to note this ononit closing' oenteet 1o. oleothe lotoh et `the eentel' of tlletloor will the 'Content- In enen e ooeetlle Winoo loe extended flexibly fnorn the v`Zell to the orienten letohng oleYioelnithen dtele of the invention will loe. oleo-r. from, the `following oleeorlpton Refertng tothe otre/Winge., there Shown in. rEgel enel Eportion' of on elevator hatch'way `10 having a plulnaflity'of sets Q l floors A ond .l loeeteol et olerent noon the lower door sections whereby when the latch connecting the sections is released permitting the doors to open the lower section will tall by gravity thereby lifting the upper section.

The two doors of each set are connected by a cable 18 secured to the lower edge ot the upper section as shown at 19 and to a bracket 2O connected to the lower section adjacent this upper edge. The intermediate portion otthe cable passes over a sheave 2l rotatably mounted on a liXed support in the hatchway.

It is desirable that only one pair of doors or door sections be opened at one time and in Fig. 1 the-sections B are shown as open and the sections A as closed. lt will be obvious that the upper section 'B will prevent the lower section A from opening and the lowerl section B will prevent the upper section ot the doors located below the landing 13 from opening.

In the form of the invention illustrated in Figs. 1-6 inclusive, mechanism is provided or latching the door sections open. This mechanism is located adjacent the fioorllevels and the latching mechanism for the doors A adjacent the loor level 12 is shown as disposed in `inoperative position and the latching mechanism ior the door sections B which are shown as open is illustrated as disposed in operative position. This latter mechanism is shown in detail in Fig. 3 and attention is directed thereto. Each of the latching mechanisms comprises a disc 30 ecccntrically pivoted at 31 to a iixed support 32 mounted in the elevator hatchway. The disc 30 has secured thereto an arm 33 to the upper end of which is pivoted at 34 a latching member or pawl 35. The pawl 35 is normally swung in a clockwise direction by a spring 36, its movement being limited vby a stop lug 37 formed on the pawl and engaging one edge of the arm 33. The pawl 35 is adapted to engage a bracket 38 secured to the lower door section 15 and the descending movementorn this section is limited by a stop 39 secured to the hatchway guide and disposed .in the path oi' the bracket 38.

As above stated the latching mechanism is normally disposed in inoperative position and this is due to the eccentric pivoting of the disc 30 whereby the weight of the disc tends to swing the disc about its pivot 3l to the position shown adjacent the floor level 12 where the arm 33 is inclined at an angle to the vertical. Tn order to swing the latching mechanism to operative position when the doors are opened each lower section 15 has secured to one edge thereof a resilient strip 40 disposed in position to engage a roller or stud Ll1 carried by the disc 30. l-Vhen the lower section approaches its wide open position the strip 40 will ennaaf-3,807

gage the roller l1 thereby swinging the disc to the position shown in Fig. 3 wherein the pawl 35 will be engaged by and will snap over the bracket 38 thus retaining the door in open position.

The oscillating movement of the disc 30 about its pivot 31 is positively limited by a stud l2 secured to the hatchway guide and disposed in an arcuate notch 43 tormed in the periphery of the disc 30. rlhis stud is headed and the head of the stud serves to retain the disc 30 in position.

In the form oi the invention shown in Figs. 1-6 inclusive provision is made for manually releasing the latch from the door when the doors are to be closed. rThis means includes a bell crank lever pivoted at 51 in the hatchway and having an arm 52 engageable with a stud 53 secured to the arm 33 and illustrated as substantially in alinement with the pivot 34rorl the pawl 35. The other arm 54 of the bell crank is connected by a cable 55 to a handle 56, the cable passing over the sheave 57 mounted in the hatchway and the handle being located in a position within the reach or the operator. YWhen the operator pulls on the cable 55 the bell crank will be swung on its pivot thereby swinging the latching mechanism away 'from the bracket 3S and releasing the doors.

As stated at the outset oi the specification it is very desirable that power be cut olil from the elevator control circuit when the hatchway doors are open. This is accomplished in the form of the invention shown particularly in Fig. 3, by a 'flexible connection 60 trom the stud 53 to a switch 61 disposed in the elevator car control circuit. This switch includes a pair ot spring contact members 62 and 63, these members being normally in contact with each other when the doors are closed and when the latching mechanism is disposed in inoperative position. Vhen, however, the latching arm 33 is swung to the vertical position as shown in Fig. 3 the contact member will be drawn out of contact with the member (32 by reason ot' the fl Xible connection 60 between the stud 53 carried by the arm 33 and a block G-l connected to the member The switch 62, 63 and block 64- arc enclosed in a casing 65 and the block extends through an opening in the casing and its movement is limited by flanges 64.

ln addition to the manually controlled means for releasing the latch there is provided automat-ically operable mechanism adapted to release the latch in case of fire causing a dangerous rise of temperature. This means consists of a weight 6G suspended by a chain 67 from a usible link 63 mounted in the el evator hatchway. A lug G9 carried by the weight is adapted to engage an arm 69 carried by the disc 30 when the llo . weight drops. The vertical." movement 4of the weight is` limitedV by a.pin, or lstudSO mounted `in the hatchway and located in an elongated slot Si in the weightGG. :It will e thus be seen that when ythe link y68 ismelted ,lower doorsection. Whenthe latching mechanism is releasedVthe switchf62, `63 will be ,permitted to closetherebyyrestoring power to the elevator car circuit, allowing the doors to automatically closel and permitting theopera-tor toeoperate the car.

Another embodiment of the `invention is illustrated in Figs. 7 and Sand in this form of the invention no latching mechanism is provided for holding the doors in open position and the car control switch is so mounted as to be engageable by a portion of one of the door sections when the door sections are in their closed position. It will be understood that the doors will remain in open position until they are manually closed because of the fact that the lower door section is made heavier than the upper door section.

Referring to Fig. 7 the upper door section 14 and the lower door section 15 are shown in closed position and the control switch 70 is located opposite a bracket 7l carried by the lower door` section. This switch comprises a pair of spring contact members 72 and 7 3 so constructed that the member 72 tends to spring away from the member 73 and open the circuit controlled thereby. The member 72 has secured thereto a block 74 which is also connected by a strip 75 to the wall of the hatchway and the block 74C is disposed in the path oi a wiper 76 carried by the bracket 7l which in turn is mounted, as above stated, on the lower door section. These parts as shown in Fig. 7 are so located that the wiper 76 will engage the block 7 4 and close the spring contact meinbers 72 and 7 3 when the lower door section is in closed position. Thus power is available for the operation of the elevator when the doors are closed. When however, the door are open the wiper 76 and the block and contact member 72 will spring away from the contact member 7 3 thereby opening the circuit.

The switches 6], and 70 may be connected in any suitable manner in the car control circuits. In Fig. 7 the switch is connected in the wire leading to the car control handle 77 and the controller contacts 78 and 79 are connected in the circuit in the usual manner to complete the motor circuit and operate the elevator in the usual manner.

From the foregoing speciiication it will be seen that simple, practical and effective mea-ns has been provided for preventing the operation of an elevator carwhen thehatchway doors are open.

Although certain specific embodiments of the invention have been particularly shown and described, it will be understood that the invention is capable of further modilication and that further changes in the `construction and in the arrangement ot the various cooperating parts maybe made without departing :trom the spirit or scope of the invention as expressed in the following` claims.

i/Vhat I claim is zl. In combination, ahatchway door movable to open and closed positions,latching mechanism` for `latching the door in open position, an elevator"` control circuit and means controlled by `said latching mechanism for opening said circuit when the door is latched and for closing the circuit when the door is unlatched.

2. In combination, a hatchway door movable to open and closed positions, latching mechanism therefor, manually operable releasing means for said latching mechanism, an elevator control circuit and means controlled by said llatching mechanism for opening said circuit when the door is latched and for closing the circuit when the door is unlatched.

3. In combination, a hatchway door movable to open and closed positions, latching` mechanism therefor, manually operable releasing means for said latching mechanism, an elevator control circuit and means operatively connected to said latching mechanism `tor opening said circuit when the door is latched and for closing1 the circuit when the door is unlatched.

4. In combination, a hatchway door movable to open and closed positions, latching mechanism for latching the door in open position, manually operable releasing means for said latching mechanism, an elevatori` control circuit and means operatively connected to said latching mechanism for opening said circuit when the door is latched and for closing the circuit when the door is unlatched.

5. In combination, a hatchway movable to open and closed positions, latching mechanism for holding the door in open position, a car control circuit including a switch mounted in the hatchway and disposed adjacent said latching mechanism, and a 'tlexiv ble connection between said switch and said mechanism whereby said switch will be opened when the door is latched open.

6. In combination, a hatchway door movable to open and closed positions, latching mechanism for holding the door in open position, a car control circuit including a switch mounted in the hatchway and disw posed adjacent said latching mechanism, a flexible connection between said switch and said mechanism whereby said switch will he opened when the door is latched open.

7. ln combination7 a hatchway door movable to open and closed positions latchingmechanism 'for holding the door in open position, a car control circuit inclndii'ig a switch mounted in the hatchway and disposed adjacent said latching niechanisn'i, a vflexible connection between said switch and said mechanism whereby said switch wiil he opened when the door is hitched open. and heat responsive means for releasingv said latching mechanism thereby permitting' said switch to close. Y

S. in combination, a hatchway door moi'- able to open and closed positions hatchingmechanism for holding the door in open position, a car control circuit` including a switch mounted in the hatchway and disposed adjacent said latching mechanism7 a flexible connection between said switch and said mechanism whereby said switch will be opened when the door1 is latched open, mannally operable means ior releasing said latching mechanism thereby Apermitting said switch to close, and heat responsive means for releasing said latching mechanism thereby permitting said switch to close.

In witness whereof I have hereunto set my hand this 7th day of Dec., 1922.

EZRA B. SMTH. lVitness:

. B. Moons. 

